Beater-roll attachment.



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BEATER ROLL ATTACHMENT.

APPLICATIONFILED DEC. 20. I911.

Patented June 29, 1915.

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Patented June 29, 1915.

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RAY ADNA NORTH, OF BELOIT, WISCONSIN, ASSIGNOR TO B. J. DOWD KNIFE WORKS, OF

BELOIT, WISCONSIN, A CORPORATION.

BEATER-ROLL ATTACHMENT.

Specification of Letters Patent.

Patented June 29, 1915.

paper: and an object of this invention is to provide an attachment of this character which may be most readily removed from the beater-roll and exchanged for another attachment having the same or a different heating surface.

Another object of this invention is to provide an attachment of the type just described which may be readilyapplied to a beater-roll and particularly to the beaterroll now in common use in paper mills throughout this country.

A third object of this invention is the provision in a beater-roll of an attachment which will greatly increase the beating capacity of the beater-roll to which it is attached. I

A fourth object of this invention is to increase at an extremely small expenditure of money the efficiency of the beater-roll now in common use.

In the drawings illustrating the principle of this invention and the best mode now known tome of applying that principle, Figure 1 is a fragmentary perspective view showing so much of a beater-roll equipped with my new attachment as is necessary to illustrate this invention, one of the attachments being shown removed from the beaterroll; Fig. 2 is a perspective view illustrating a fragment of my new attachment detached;

Fig. 3 is a fragmentary perspective view showing my new attachment assembled in place between a pair of beater-roll bars of a type in common use now in paper mills throughout this country; Fig. 4 is a fragmentary perspective view similar to Fig. 2 and illustrates a modified form of my new attachment; and Figs. 5 and 6 are perspective views illustrating other modified forms of my new attachment.

In the beater-roll in common use today there projects from the cylindrical surface of the roll the edges of the knife-bars or roll-bars a between the base portions of which are laid blocks 12 of wood: and an end ring 0 is provided at each end of the roll for the purpose of holding the roll-bars and the blocks of wood in assembled relation to one another.

Referring to Fig. 3, my new attachment consists of plates of wood and steel, the plates (5 of wood alternating withor being sandwiched between the plates of steel 6, These plates 03, e are fastened together to form a unitary structure by rivets) the heads f of which are countersunk and the plates are formed furthermore with boltholes 9 (one of which is shown in Fig. 3). The knife-bars a are formed with boltholes 9 through which and the bolt-holes g'f are passed the bolts 9 upon the ends of which are screwed the nuts h. A space i is left between the bottom of each attachment and the wooden blocks 6 beneath it to afford clearance for the swelling of the wooden plates (1 of the attachment; These wooden plates d wear away more rapidly, of course. than do the steel plates e and the edges of the latter are left exposed and in positionto operate most effectively in drawing outthe fiber of the stock. Other materials than a a wood and steel may be used; the essential point being that one material should be more wear-resisting than the other, in order that the sharp edges of the harder "material may become exposed in the ordinaryuse of the attachment.

As isclearlyshown in Fig. 1 of the drawings, the open channels z" between successive pairs of the knife-bars a are devoid of the filling plates cl, 6, and are thereby adapted for the free circulation of the stock which is being beaten. v

Forthe proper beating of a given kind of paper-stock and the production of the best result, a particular kind of abrasive surface is required; that-is, the character of the latter should be that best adapted for the stock which is beaten. In the treatment of jute, old rope and like material, a cutting action is required and the plates are atively thin, so that the edges presented will be sharp, and the plates extend parallel to the axis of the. beater-roll. Such an attachment is shown in Fig. 3 of the drawings.

trated in Fig. 6.

\Vhere the stock to be treated is old rags, the plates 6' are similarly disposed but are made about one-half inch in width, as are also the wooden plates 01. When the wooden plates wear down, this greater width of the steel plates leaves an edge portion sufficiently strong to resist the bending action of the stock (Fig. t). Where the stock to be worked is sulfite fiber or ground wood, it requires to be drawn out; and, if the plates were set as shown in Figs. 3 and at, there would be too much cutting action and not enough drawing action. Hence, in working with this kind of stock, an attachment having a surface such asthat shown in Fig. 5 is deemed by me the one best adapted to produce a satisfactory product. Here the plates d, e" are placed diagonally or inclined to the axis of the beater-roll and are held by L-shaped plates j which form a suitable casing. In the manufacture, of book and writing papers, a combination of the cutting and drawing-out or shredding actions is deemed by me to be the best and zigzag plates of steel 6* are here used which are separated by blocks of wood 61", as is illus- As in the construction shown in Fig 5, the plates of steel 6" and the blocks of wood d" are held incased within the L-shaped plates j.

In many mills in this country different grades of paper are made and in such mills the beatersare required to Work on one kind of stock at one time and at another time on another kind of stock, depending upon the particular orders which are to be filled at the particular time.

In beater-rolls having roll-bars a equipped with my new attachment, the heaters may be changed readily so as to fit them for beating different kinds of stock and to pass quickly from one kind to another. As will be obvious, it requires merely the loosening of the boltsg, lifting out the attachment unsuited to the stock to be next beaten, replacing it by an attachment which is suited to the particular stock next to be beaten and fastening the new attachment in place by replacing and tightening the bolts 9.

It is to be observed that my new attachment may be readily and at a nominal cost embodied in the beater-roll as manufactured and used for-the past quarter of a century. The knife-bars a occupy exactly the same position as in these old beaterrolls; it is necessary only to bore the boltholes g in the knife-bars a and then to insort the attachment therebetween. In this way the effective abrasive surface of the beater-roll may be increased about four hundred percent. (400%) and by thus increasing the surface pregented to the stock I am enabled to reduce greatly the time required to draw out completely the fibers that one made inefficient by wear. In case one of the attachments becomes broken, repairs are easily effected. It is obvious that the extent of the beating surface-may be Va- -'ried by simply varying the number of attachments used, removing or adding to the same as the exigencies of the particular case may require. In describing the materials used in making my new attachment, it was stated hereinbefore that the steel plates are sandwiched between wooden plates; but it is obvious that the same general result may be accomplished by the use of other materials having difierent wearing qualities. The main point sought to be attained in this regard is the maintenance of an abrasive face on the attachment by reason of the unequal wear of the plates composing the same.

I claim:

1. A beater roll comprising a plurality of radially projecting fly bars spaced apart, sets of thin alternate strips of materials having different wear-resisting qualities, the strips of each set rigidly secured together and constituting a unitary abrasive filling insertible in any of said pockets, and trans-. verse fastening means for removably securing each unitary filling in place in a radial pocket of the beater roll.

2. A paper-stock beating attachment for a beater-roll comprising wear-resisting plates separated by plates which are less wear-resisting than the latter said plates being assembledand fastened together to form a unitary structure shaped to fit in the interval between a pair of beater-roll knifebars; and the axially-extending edges of certain of said plates projecting only slightly beyond the corresponding'edges of the others of said plates and forming there with a paper-stock beating surface.

3. A beater-roll section comprising a pair of beater-roll knife-bars forming pockets between them and provided with a paperstock beating attachment consisting of plates of unequal wear-resisting qualities assembled and fastened together to form a unitary structure and detachably secured in the pocket between said knife-bars and readily removable therefrom; and the axially-extending edges of certain of said plates projecting only slightly beyond the corresponding edges of the others of said plates and forming therewith a paper-stock heating surface.

4. A beater-roll section comprising apair of beater-roll knife-bars forming pockets between them and provided with a paperstock beating attachment consisting of plates of unequal weanresisting qualities assembled and fastened together to form a unitary structure and detachably secured in the pocket between said knife-bars and readily removable therefrom; the outer longitudinal edges of the latter forming with the outer longitudinal edges of said plates a beating surface; and the axially-extending edges of certain of said plates projecting only. slightly beyond the corresponding edges of the others of said plates and forming therewith a paper-stock beating. surface.

5. A beater-roll section comprising a pair of beater-roll knife-bars formed with holes; and a paperstock beating attachment mounted in the interval between said knifebars and consisting of plates of unequal wear-resisting qualities fastened together to form a unitary structure; the axially-extending edges of certain of said plates projecting only slightly beyond the corresponding edges of the others of said plates and forming therewith a paper-stock beating surface; and fastening devices which pass through the holes in said knife-bars and detachably fasten said attachment in the interval between said knife-bars.

6. A beater-roll including a plurality of spaced beater-roll sections each of which comprises a pair of beater-roll knife-bars forming pockets between them and provided with a paper-stock beating attachment consisting of filling plates of unequal Wear-resisting qualities assembled and fastened to gether to form a unitary structure anddetaehably secured in the pocket between the pair of knife-bars and readily removable therefrom; the axially-extending edges of certain of said plates projecting only slightly beyond the corresponding edges of the others of said plates and forming therewith a paper-stock beating surface; said sections being separated by channels devoid of filling plates and thereby adapted for the free circulation of the stock beaten.

Signed in the presence of the two undersigned witnesses this 2nd day of November,

which is being RAY ADNA NORTH.

Witnesses ALIDE L. DUHAIME, WM.- E. WALLACE. 

